lynis
Security auditing tool for Linux, macOS, and UNIX-based system
... detection, and system hardening. Test that Docker image, or improve the hardening of your deployed web application. Run daily health scans to discover new weaknesses. Show colleagues or clients what can be done to improve security. Discover security weaknesses on systems of your clients, that may eventually result in system compromise. Lynis runs on almost all UNIX-based systems and versions.